Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence

Jiaming Li, Zhihao Zhu, Ran Zhou, Nan Zhao, Rongxing Yi, Xinyan Yang, Xiangyou Li, Lianbo Guo, Xiaoyan Zeng, Yongfeng Lu

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.

Original languageEnglish (US)
Pages (from-to)8134-8139
Number of pages6
JournalAnalytical chemistry
Volume89
Issue number15
DOIs
StatePublished - Aug 1 2017

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence'. Together they form a unique fingerprint.

  • Cite this